<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="no"?>
<!--XBRL document created with Bowne Tagger XBRL Enabler by Bowne Software version 10.0.0.34-->
<!--Based on XBRL 2.1--> <!--Created on: 5/2/2009 2:16:18 AM--> <!--Modified on: 7/30/2009 12:24:06 AM-->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xlink="http://www.w3.org/1999/xlink"
xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"
xmlns:xbrldt="http://xbrl.org/2005/xbrldt"> <roleRef xlink:type="simple"
xlink:href="wmi-20090630.xsd#StatementsOfChangesInEquityParenthetical"
roleURI="http://wm.com/20090630/role/StatementsOfChangesInEquityParenthetical" />
<roleRef xlink:type="simple"
xlink:href="wmi-20090630.xsd#NewAccountingPronouncementPendingAdoption"
roleURI="http://wm.com/20090630/role/NewAccountingPronouncementPendingAdoption" />
<arcroleRef xlink:type="simple"
xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"
arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#BalanceSheetsParenthetical"
roleURI="http://wm.com/20090630/role/BalanceSheetsParenthetical" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#StatementsOfChangesInEquity"
roleURI="http://wm.com/20090630/role/StatementsOfChangesInEquity" /> <arcroleRef
xlink:type="simple"
xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"
arcroleURI="http://xbrl.org/int/dim/arcrole/all" /> <arcroleRef
xlink:type="simple"
xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"
arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" /> <arcroleRef
xlink:type="simple"
xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"
arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#DocumentAndEntityInformation"
roleURI="http://wm.com/20090630/role/DocumentAndEntityInformation" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#BasisOfPresentation"
roleURI="http://wm.com/20090630/role/BasisOfPresentation" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#LandfillAndEnvironmentalRemediationLiabilities"
roleURI="http://wm.com/20090630/role/LandfillAndEnvironmentalRemediationLiabilities" />
<roleRef xlink:type="simple" xlink:href="wmi-20090630.xsd#Debt"
roleURI="http://wm.com/20090630/role/Debt" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#IncomeTaxes"
roleURI="http://wm.com/20090630/role/IncomeTaxes" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#ComprehensiveIncome"
roleURI="http://wm.com/20090630/role/ComprehensiveIncome" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#EarningsPerShare"
roleURI="http://wm.com/20090630/role/EarningsPerShare" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#CommitmentsAndContingencies"
roleURI="http://wm.com/20090630/role/CommitmentsAndContingencies" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#Restructuring"
roleURI="http://wm.com/20090630/role/Restructuring" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#SegmentAndRelatedInformation"
roleURI="http://wm.com/20090630/role/SegmentAndRelatedInformation" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#IncomeExpenseFromDivestituresAssetImpairmentsAndUnusualItems"
roleURI="http://wm.com/20090630/role/IncomeExpenseFromDivestituresAssetImpairmentsAndUnusualItems" />
<roleRef xlink:type="simple"
xlink:href="wmi-20090630.xsd#FairValueMeasurements"
roleURI="http://wm.com/20090630/role/FairValueMeasurements" /> <roleRef
xlink:type="simple"
xlink:href="wmi-20090630.xsd#CondensedConsolidatingFinancialStatements"
roleURI="http://wm.com/20090630/role/CondensedConsolidatingFinancialStatements" />
<roleRef xlink:type="simple" xlink:href="wmi-20090630.xsd#BalanceSheets"
roleURI="http://wm.com/20090630/role/BalanceSheets" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#StatementsOfOperations"
roleURI="http://wm.com/20090630/role/StatementsOfOperations" /> <roleRef
xlink:type="simple" xlink:href="wmi-20090630.xsd#StatementsOfCashFlows"
roleURI="http://wm.com/20090630/role/StatementsOfCashFlows" /> <arcroleRef
xlink:type="simple"
xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"
arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/DocumentAndEntityInformation"
xlink:title="00 - Document - Document and Company Information" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/BasisOfPresentation"
xlink:title="0601 - Disclosure - Basis of Presentation" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/LandfillAndEnvironmentalRemediationLiabilities"
xlink:title="0602 - Disclosure - Landfill and Environmental Remediation Liabilities" />
<definitionLink xlink:type="extended"
xlink:role="http://wm.com/20090630/role/Debt"
xlink:title="0603 - Disclosure - Debt" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/IncomeTaxes"
xlink:title="0604 - Disclosure - Income Taxes" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/ComprehensiveIncome"
xlink:title="0605 - Disclosure - Comprehensive Income" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/EarningsPerShare"
xlink:title="0606 - Disclosure - Earnings Per Share" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/CommitmentsAndContingencies"
xlink:title="0607 - Disclosure - Commitments and Contingencies" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/Restructuring"
xlink:title="0608 - Disclosure - Restructuring" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/SegmentAndRelatedInformation"
xlink:title="0609 - Disclosure - Segment and Related Information" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/IncomeExpenseFromDivestituresAssetImpairmentsAndUnusualItems"
xlink:title="0610 - Disclosure - (Income) Expense from Divestitures, Asset Impairments and Unusual Items" />
<definitionLink xlink:type="extended"
xlink:role="http://wm.com/20090630/role/FairValueMeasurements"
xlink:title="0611 - Disclosure - Fair Value Measurements" /> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/CondensedConsolidatingFinancialStatements"
xlink:title="0612 - Disclosure - Condensed Consolidating Financial Statements" />
<definitionLink xlink:type="extended"
xlink:role="http://wm.com/20090630/role/BalanceSheets"
xlink:title="01 - Statement - Condensed Consolidated Balance Sheets"> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" /> </definitionLink> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/StatementsOfOperations"
xlink:title="02 - Statement - Condensed Consolidated Statements of Operations">
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" /> </definitionLink> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/StatementsOfCashFlows"
xlink:title="03 - Statement - Condensed Consolidated Statements of Cash Flows">
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" /> </definitionLink> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/BalanceSheetsParenthetical"
xlink:title="011 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)">
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" /> </definitionLink> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/StatementsOfChangesInEquity"
xlink:title="04 - Statement - Condensed Consolidated Statements of Changes in Equity">
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" use="optional" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementEquityComponentsAxis"
xlink:label="loc_StatementEquityComponentsAxis" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension"
xlink:from="loc_StatementTable"
xlink:to="loc_StatementEquityComponentsAxis" order="2" use="optional" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_EquityComponentDomain"
xlink:label="loc_EquityComponentDomain" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain"
xlink:from="loc_StatementEquityComponentsAxis"
xlink:to="loc_EquityComponentDomain" order="2" use="optional" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_EquityComponentDomain"
xlink:label="loc_EquityComponentDomain_2" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default"
xlink:from="loc_StatementEquityComponentsAxis"
xlink:to="loc_EquityComponentDomain_2" order="2" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CommonStockMember"
xlink:label="loc_CommonStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_CommonStockMember"
order="1" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PreferredStockMember"
xlink:label="loc_PreferredStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_PreferredStockMember" order="3" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"
xlink:label="loc_AdditionalPaidInCapitalMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_AdditionalPaidInCapitalMember" order="8" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_TreasuryStockMember"
xlink:label="loc_TreasuryStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_TreasuryStockMember"
order="9" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsMember"
xlink:label="loc_RetainedEarningsMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_RetainedEarningsMember" order="10" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsAppropriatedMember"
xlink:label="loc_RetainedEarningsAppropriatedMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_RetainedEarningsAppropriatedMember" order="12"
use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember"
xlink:label="loc_RetainedEarningsUnappropriatedMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_RetainedEarningsUnappropriatedMember" order="13"
use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember"
xlink:label="loc_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember"
order="14" use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember"
xlink:label="loc_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember"
order="15" use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"
xlink:label="loc_AccumulatedOtherComprehensiveIncomeMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_AccumulatedOtherComprehensiveIncomeMember" order="11" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"
xlink:label="loc_AccumulatedNetUnrealizedInvestmentGainLossMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedNetUnrealizedInvestmentGainLossMember"
order="18" use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"
xlink:label="loc_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"
order="19" use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"
xlink:label="loc_AccumulatedTranslationAdjustmentMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedTranslationAdjustmentMember" order="20"
use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"
xlink:label="loc_AccumulatedDefinedBenefitPlansAdjustmentMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedDefinedBenefitPlansAdjustmentMember" order="21"
use="optional" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ComprehensiveIncomeMember"
xlink:label="loc_ComprehensiveIncomeMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_ComprehensiveIncomeMember" order="23" use="optional" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_EquityComponentDomain"
xlink:label="us-gaap_EquityComponentDomain" /> <loc xlink:type="locator"
xlink:href="wmi-20090630.xsd#wmi_NoncontrollingInterestsMember"
xlink:label="wmi_NoncontrollingInterestsMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="us-gaap_EquityComponentDomain"
xlink:to="wmi_NoncontrollingInterestsMember" order="0.98" priority="1" />
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ParentMember"
xlink:label="loc_ParentMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_ParentMember"
order="1" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember" xlink:to="loc_CommonStockMember" order="2" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember" xlink:to="loc_PreferredStockMember"
order="3" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember"
xlink:to="loc_AdditionalPaidInCapitalMember" order="7" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherAdditionalCapitalMember"
xlink:label="loc_OtherAdditionalCapitalMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AdditionalPaidInCapitalMember"
xlink:to="loc_OtherAdditionalCapitalMember" order="8" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredCompensationShareBasedPaymentsMember"
xlink:label="loc_DeferredCompensationShareBasedPaymentsMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember"
xlink:to="loc_DeferredCompensationShareBasedPaymentsMember" order="9" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember" xlink:to="loc_TreasuryStockMember"
order="10" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember" xlink:to="loc_RetainedEarningsMember"
order="11" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember"
xlink:label="loc_AccumulatedDistributionsInExcessOfNetIncomeMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember"
xlink:to="loc_AccumulatedDistributionsInExcessOfNetIncomeMember"
order="16" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_ParentMember"
xlink:to="loc_AccumulatedOtherComprehensiveIncomeMember" order="17" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NoncontrollingInterestMember"
xlink:label="loc_NoncontrollingInterestMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_NoncontrollingInterestMember" order="22" /> </definitionLink>
<definitionLink xlink:type="extended"
xlink:role="http://wm.com/20090630/role/StatementsOfChangesInEquityParenthetical"
xlink:title="041 - Statement - Condensed Consolidated Statements of Changes in Equity (Parenthetical)">
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementLineItems"
xlink:label="loc_StatementLineItems" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementTable"
xlink:label="loc_StatementTable" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/all"
xlink:from="loc_StatementLineItems" xlink:to="loc_StatementTable"
order="1" xbrldt:contextElement="segment" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StatementEquityComponentsAxis"
xlink:label="loc_StatementEquityComponentsAxis" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension"
xlink:from="loc_StatementTable"
xlink:to="loc_StatementEquityComponentsAxis" order="2" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_EquityComponentDomain"
xlink:label="loc_EquityComponentDomain" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain"
xlink:from="loc_StatementEquityComponentsAxis"
xlink:to="loc_EquityComponentDomain" order="2" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CommonStockMember"
xlink:label="loc_CommonStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_CommonStockMember"
order="1" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PreferredStockMember"
xlink:label="loc_PreferredStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_PreferredStockMember" order="3" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CapitalUnitsMember"
xlink:label="loc_CapitalUnitsMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_CapitalUnitsMember"
order="5" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember"
xlink:label="loc_CommonStockIncludingAdditionalPaidInCapitalMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_CommonStockIncludingAdditionalPaidInCapitalMember"
order="6" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PreferredStockIncludingAdditionalPaidInCapitalMember"
xlink:label="loc_PreferredStockIncludingAdditionalPaidInCapitalMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_PreferredStockIncludingAdditionalPaidInCapitalMember"
order="7" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"
xlink:label="loc_AdditionalPaidInCapitalMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_AdditionalPaidInCapitalMember" order="8" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_TreasuryStockMember"
xlink:label="loc_TreasuryStockMember" /> <definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain" xlink:to="loc_TreasuryStockMember"
order="9" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsMember"
xlink:label="loc_RetainedEarningsMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_RetainedEarningsMember" order="10" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsAppropriatedMember"
xlink:label="loc_RetainedEarningsAppropriatedMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_RetainedEarningsAppropriatedMember" order="13" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember"
xlink:label="loc_RetainedEarningsUnappropriatedMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_RetainedEarningsUnappropriatedMember" order="14" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember"
xlink:label="loc_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_UndistributedIncomeFromOtherThanGainOrLossOnSaleOfPropertiesMember"
order="15" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember"
xlink:label="loc_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_RetainedEarningsMember"
xlink:to="loc_UndistributedNetRealizedGainOrLossOnSaleOfPropertiesMember"
order="16" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"
xlink:label="loc_AccumulatedOtherComprehensiveIncomeMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_AccumulatedOtherComprehensiveIncomeMember" order="11" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"
xlink:label="loc_AccumulatedNetUnrealizedInvestmentGainLossMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedNetUnrealizedInvestmentGainLossMember"
order="17" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"
xlink:label="loc_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" />
<definitionArc xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"
order="18" /> <loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"
xlink:label="loc_AccumulatedTranslationAdjustmentMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedTranslationAdjustmentMember" order="19" /> <loc
xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"
xlink:label="loc_AccumulatedDefinedBenefitPlansAdjustmentMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_AccumulatedOtherComprehensiveIncomeMember"
xlink:to="loc_AccumulatedDefinedBenefitPlansAdjustmentMember" order="20" />
<loc xlink:type="locator"
xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ComprehensiveIncomeMember"
xlink:label="loc_ComprehensiveIncomeMember" /> <definitionArc
xlink:type="arc"
xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member"
xlink:from="loc_EquityComponentDomain"
xlink:to="loc_ComprehensiveIncomeMember" order="12" /> </definitionLink> <definitionLink
xlink:type="extended"
xlink:role="http://wm.com/20090630/role/NewAccountingPronouncementPendingAdoption"
xlink:title="0613 - Disclosure - New Accounting Pronouncement Pending Adoption" />
</linkbase>
</XBRL>
